Finding the Fourth Proportional to 1,528,139.80, 2,292,209.70 and 390,899.80
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Solution
The fourth proportional to 1,528,139.80, 2,292,209.70 and 390,899.80 is: 586,349.70
Step by Step Solution
- Step 1: Write the proportion equation
1,528,139.80 : 2,292,209.70 = 390,899.80 : x - Step 2: Convert to fraction form
1,528,139.80/2,292,209.70 = 390,899.80/x - Step 3: Cross multiply
1,528,139.80x = 2,292,209.70 × 390,899.80 - Step 4: Simplify right side
1,528,139.80x = 896,024,313,288.06 - Step 5: Solve for x
x = 896,024,313,288.06/1,528,139.80 - Step 6: Final answer
x = 586,349.70
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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.