Home / 645,316.52-890,500.23-358,830.45

Finding the Fourth Proportional to 645,316.52, 890,500.23 and 358,830.45

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Solution

The fourth proportional to 645,316.52, 890,500.23 and 358,830.45 is: 495,165.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,316.52 : 890,500.23 = 358,830.45 : x
  2. Step 2: Convert to fraction form
    645,316.52/890,500.23 = 358,830.45/x
  3. Step 3: Cross multiply
    645,316.52x = 890,500.23 × 358,830.45
  4. Step 4: Simplify right side
    645,316.52x = 319,538,598,256.00
  5. Step 5: Solve for x
    x = 319,538,598,256.00/645,316.52
  6. Step 6: Final answer
    x = 495,165.69

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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.