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Finding the Fourth Proportional to 630,613.65, 870,266.06 and 358,720.95

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Solution

The fourth proportional to 630,613.65, 870,266.06 and 358,720.95 is: 495,045.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    630,613.65 : 870,266.06 = 358,720.95 : x
  2. Step 2: Convert to fraction form
    630,613.65/870,266.06 = 358,720.95/x
  3. Step 3: Cross multiply
    630,613.65x = 870,266.06 × 358,720.95
  4. Step 4: Simplify right side
    630,613.65x = 312,182,666,002.35
  5. Step 5: Solve for x
    x = 312,182,666,002.35/630,613.65
  6. Step 6: Final answer
    x = 495,045.84

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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.