Home / 1,530.70-2,113.65-972.16

Finding the Fourth Proportional to 1,530.70, 2,113.65 and 972.16

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Solution

The fourth proportional to 1,530.70, 2,113.65 and 972.16 is: 1,342.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,530.70 : 2,113.65 = 972.16 : x
  2. Step 2: Convert to fraction form
    1,530.70/2,113.65 = 972.16/x
  3. Step 3: Cross multiply
    1,530.70x = 2,113.65 × 972.16
  4. Step 4: Simplify right side
    1,530.70x = 2,054,805.98
  5. Step 5: Solve for x
    x = 2,054,805.98/1,530.70
  6. Step 6: Final answer
    x = 1,342.40

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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.