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Finding the Fourth Proportional to 630,642.85, 870,307.49 and 358,703.75

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Solution

The fourth proportional to 630,642.85, 870,307.49 and 358,703.75 is: 495,022.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    630,642.85 : 870,307.49 = 358,703.75 : x
  2. Step 2: Convert to fraction form
    630,642.85/870,307.49 = 358,703.75/x
  3. Step 3: Cross multiply
    630,642.85x = 870,307.49 × 358,703.75
  4. Step 4: Simplify right side
    630,642.85x = 312,182,563,388.62
  5. Step 5: Solve for x
    x = 312,182,563,388.62/630,642.85
  6. Step 6: Final answer
    x = 495,022.76

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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.