Finding the Fourth Proportional to 909,646,908.70, 1,364,470,363.05 and 812,712,070.30
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Solution
The fourth proportional to 909,646,908.70, 1,364,470,363.05 and 812,712,070.30 is: 1,219,068,105.45
Step by Step Solution
- Step 1: Write the proportion equation
909,646,908.70 : 1,364,470,363.05 = 812,712,070.30 : x - Step 2: Convert to fraction form
909,646,908.70/1,364,470,363.05 = 812,712,070.30/x - Step 3: Cross multiply
909,646,908.70x = 1,364,470,363.05 × 812,712,070.30 - Step 4: Simplify right side
909,646,908.70x = 1,108,921,533,617,358,080 - Step 5: Solve for x
x = 1,108,921,533,617,358,080/909,646,908.70 - Step 6: Final answer
x = 1,219,068,105.45
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Double scale
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Similar ratio
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.