Finding the Fourth Proportional to 687,255,307.28, 948,412,464.36 and 378,205,963.28
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Solution
The fourth proportional to 687,255,307.28, 948,412,464.36 and 378,205,963.28 is: 521,924,306.54
Step by Step Solution
- Step 1: Write the proportion equation
687,255,307.28 : 948,412,464.36 = 378,205,963.28 : x - Step 2: Convert to fraction form
687,255,307.28/948,412,464.36 = 378,205,963.28/x - Step 3: Cross multiply
687,255,307.28x = 948,412,464.36 × 378,205,963.28 - Step 4: Simplify right side
687,255,307.28x = 358,695,249,670,032,448 - Step 5: Solve for x
x = 358,695,249,670,032,448/687,255,307.28 - Step 6: Final answer
x = 521,924,306.54
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1.5x scale
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.