Finding the Fourth Proportional to 1,122,890,156.16, 1,549,484,424.74 and 621,088,139.68
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Solution
The fourth proportional to 1,122,890,156.16, 1,549,484,424.74 and 621,088,139.68 is: 857,044,113.85
Step by Step Solution
- Step 1: Write the proportion equation
1,122,890,156.16 : 1,549,484,424.74 = 621,088,139.68 : x - Step 2: Convert to fraction form
1,122,890,156.16/1,549,484,424.74 = 621,088,139.68/x - Step 3: Cross multiply
1,122,890,156.16x = 1,549,484,424.74 × 621,088,139.68 - Step 4: Simplify right side
1,122,890,156.16x = 962,366,398,828,391,168 - Step 5: Solve for x
x = 962,366,398,828,391,168/1,122,890,156.16 - Step 6: Final answer
x = 857,044,113.85
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.