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Finding the Fourth Proportional to 630,418.06, 870,001.32 and 358,510.78

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Solution

The fourth proportional to 630,418.06, 870,001.32 and 358,510.78 is: 494,758.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    630,418.06 : 870,001.32 = 358,510.78 : x
  2. Step 2: Convert to fraction form
    630,418.06/870,001.32 = 358,510.78/x
  3. Step 3: Cross multiply
    630,418.06x = 870,001.32 × 358,510.78
  4. Step 4: Simplify right side
    630,418.06x = 311,904,851,834.23
  5. Step 5: Solve for x
    x = 311,904,851,834.23/630,418.06
  6. Step 6: Final answer
    x = 494,758.75

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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.