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Finding the Fourth Proportional to 530,448.80, 732,038.66 and 288,719.69

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Solution

The fourth proportional to 530,448.80, 732,038.66 and 288,719.69 is: 398,443.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    530,448.80 : 732,038.66 = 288,719.69 : x
  2. Step 2: Convert to fraction form
    530,448.80/732,038.66 = 288,719.69/x
  3. Step 3: Cross multiply
    530,448.80x = 732,038.66 × 288,719.69
  4. Step 4: Simplify right side
    530,448.80x = 211,353,974,983.22
  5. Step 5: Solve for x
    x = 211,353,974,983.22/530,448.80
  6. Step 6: Final answer
    x = 398,443.69

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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.