Home / 645,322.95-890,509.11-358,836.89

Finding the Fourth Proportional to 645,322.95, 890,509.11 and 358,836.89

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Solution

The fourth proportional to 645,322.95, 890,509.11 and 358,836.89 is: 495,174.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,322.95 : 890,509.11 = 358,836.89 : x
  2. Step 2: Convert to fraction form
    645,322.95/890,509.11 = 358,836.89/x
  3. Step 3: Cross multiply
    645,322.95x = 890,509.11 × 358,836.89
  4. Step 4: Simplify right side
    645,322.95x = 319,547,519,549.07
  5. Step 5: Solve for x
    x = 319,547,519,549.07/645,322.95
  6. Step 6: Final answer
    x = 495,174.58

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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.